Stereo Input Channels; Aux [On] Button; Aux Pre Or Post - Yamaha O2R Owner's Manual

Auxiliary Channels 101

Stereo Input Channels

Input channels 1 through 16 are mono inputs. The stereo input channels 17
through 24 are paired together and handle two signals: left and right.
Before feeding a stereo input signal to the auxiliary level controls, the left
and right signals are summed to form a mono L+R mix.

AUX [ON] Button

The auxiliary sends can be turned on or off for quick A-B comparisons by
using the [ON] button in the AUX group of the SELECTED CHANNEL
controls. When the send for a channel is turned off, the send level icon for
that channel continues to show the current level setting for the channel, but
the text underneath the icon switches to "OFF" giving you a quick visual
indicator of the channel send status:
The LED inset in the [ON] button is illuminated when the send for a
channel is turned on.
Note: The [ON] button of the SELECTED CHANNEL – AUX controls is the
only way to turn the channel send on or off.

AUX Pre or Post

The auxiliary sends can be configured as pre-fader or post-fader. This
setting can be changed by selecting a channel with a [SEL] button or the
CURSOR buttons and pressing the [ENTER] button for that channel.
If you select a channel with a [SEL] button or the CURSOR buttons and
double-click the [ENTER] button, all channels will be set to the same
pre-fader or post-fader status as the selected channel.
02R User's Guide